Isn't that mostly due to the current business models, we are still in start up stage on the tech and it's really a race to stake claims. We are already seeing projects that move the other way. Their business model is to rationalize the infrastructure so they can service their users for any need.
How long will it be till we see your local device and storage be treated as part of the cloud not just a bucket that collects the rain that falls?
Soon enough someone will build a small lightweight cloud server that you'll be happy to have sandboxed on your devices. Then the business model moves to one that offer syncing services between all the clouds you have rights over. Shared or otherwise they can start to offer interesting things across small connection that are trickle feed updates 24/7 to and from your local cloud with more important updates getting priority. You won't need to worry about if or how your connected as 90% of the internet/cloud that matters to you will be with you anyway.
Your information will always be in one form in your hands, and maybe at your house, but also redundantly at your mums houses or the houses of anyone you have shared with. Well yes in the hands of the orginating service.
To me it's the snycing/backup posiblilities of Lala's technologies that Apple wants to get their hands on, more than the service itself.
Still the service would be good too but i can't see them getting rightholders to agree in this neck of the woods for many many years to come.